Dermatomyositis (DM) / polymyositis (PM), is an autoimmune disease whose cause is still unknown. The main pathological changes are non-specific inflammation of the skin and muscles, resulting in diffuse edematous erythema of the skin and painful muscle weakness, which may be accompanied by muscle atrophy and other symptoms in advanced stages. Although its incidence is not as high as that of SLE, it is more difficult to treat with hormones or immunosuppressive drugs, which have more side effects and are more difficult to withdraw. Ms. Chen Xiangjun used the combination of Chinese and Western medicine to treat DM and PM with the method of benefitting the qi and strengthening the spleen, and achieved certain efficacy, and helped to smoothly decrease the hormone and make the disease stable. 1. dermatomyositis Mao, female, 30 years old, diagnosed on June 13, 1992. She was seen for 1 month for muscle pain and weakness in both arms, calves and limbs, accompanied by soreness in the large joints of the limbs. 1 month later, there was no obvious reason for muscle pain in both forearms and calves, muscle weakness, soreness in the large joints of the limbs, and a history of recurrent episodes of erythema multiforme, rash around the finger joints and metacarpophalangeal joints. We checked the muscle pressure (+) of both upper limbs proximal and shoulder muscles, ESR 32MM/H, IGM 289MG/L, GPT 2700U/L (<40U/L), LDH 501 U/L (60-140U/L), CPK 4274, 92U/L (15-110U/L), -hydroxy Butyrate dehydrogenase 360.68 U/L (65-160 U/L), electromyography showed: "myogenic damage", and was diagnosed as dermatomyositis. According to his arms, legs, muscle pain and weakness, his face was atrophic, his tongue was thin with tooth marks, and his pulse was thin. The evidence belongs to deficiency of the spleen, lack of biochemical source of qi and blood, and loss of muscle nourishment. I gave to strengthen the spleen, invigorate Qi and activate blood circulation. Deficiency of spleen, dampness and stagnation, heat and toxicity. Combined with cooling the blood and detoxifying products. After taking the above medicine for more than 1 month, rechecked GPT43,5U/L, CPKL200,4U/L. Still felt soreness and weakness in shoulder and back and arm muscles, muscle strength was significantly reduced, stomach and appetite were still acceptable, tongue coating was white and greasy, pulse was thin. To strengthen the spleen and resolve dampness. The medicine used: raw astragalus 30G, white atractylodes, wind, has, angelica, safflower each 12G, coix seed 30G, Chen Pi, half summer each 9G, poria, zedoary each 20G, Dan Shen, chicken blood vine each 30G, bee house 12G. above treatment after 2 months, muscle pain significantly improved, muscle strength increased, recheck each muscle enzyme are back to normal, hormone gradually reduced, to the end of 1994 to stop using. At present, the disease is stable, continue to take Chinese medicine, outpatient follow-up. 2. polymyositis Fang, female, 39 years old, was diagnosed on March 29, 1994. She has been suffering from polymyositis for 20 years, and has been treated with hormone for a long time since 1984. 1993, she was treated with prednisone 60MG/D for more than a year due to cold, which caused muscle pain and weakness in the proximal limbs and prevented her from walking. After coming to the hospital, he was tested for CPK372 U/L, LDH103 U/L (619U/I-), GOTL434 U/L (86U/L), EKG: T-wave changes, occasional ventricular premature and atrial premature. The examination: the body is thin, supported by people to walk, the limbs are weak, muscle atrophy, muscle pain and trembling after exertion, the appetite is still okay, stool once a day, the tongue is light purple coating thin, the pulse is thin and heavy pressing weak. Herbs: Astragalus membranaceus 30G, Radix Angelicae Sinensis 12G, Radix Paeoniae Alba 60G, Radix Rehmanniae and Radix Rehmanniae 12G each, Cornu Cervi Pantotrichum 9G, Salviae Miltiorrhizae 30G, Dilong 15G, Atractylodes Macrocephala 10G, Coix Coix Seeds 12G, Radix Rehmanniae 30G, Wang Bu Liu Xing 15G, Chuanxiong 20G, Yam 15G, Xihe Liu 30G, Papaya, Cuscuta, Niubizi 15G each, Safflower 10G, Yan Hu Suo 30G. After 7 doses, muscle In October 1995, CPK 76 U/L, LDHL, 2 7 U/L (76 U/L), GPT 283, 4 U/L (17 U/L) were rechecked. Most scholars classify DM and PM as impotence. Suwen? The book of "The Book of the Living Qi and Tongtian" says: "Dampness and heat do not move, the large tendons are soft and short, the small tendons are long and relaxed, soft and short for detention, long and relaxed for impotence." It is also said that impotence is closely related to the internal organs and treatment should be "exclusive to Yangming." According to Chen Xiangjun, the spleen is the essence of the posterior, the spleen is the master of the limbs and muscles, and if the spleen is deficient, the limbs and muscles will not be moistened by qi and blood, while the liver is the master of tendons and the kidney is the master of bones, and if the liver and kidney are deficient, the tendons and bones will not be nourished and the limbs will not be used. Under the guidance of the theory of Chinese medicine, the treatment of DM and PM with Chinese herbal medicine as the main evidence has achieved certain results. Case 1: The patient has soreness and weakness in the arm and leg muscles, with an atrophic complexion, thin moss on the edge of the tongue with tooth marks and a thin pulse. This is a case of weakness of the spleen and stomach, lack of biochemical sources of qi and blood, hence the atrophy of the face, thin moss on the edge of the tongue with tooth marks, and thin pulse. Spleen deficiency, dampness and turbidity are internally generated and the tendons and blood are obstructed, so we see muscle pain and weakness in the arms and legs. Dampness turns into heat and toxicity and overflows the muscle surface, resulting in recurrent erythema multiforme and rash around the metacarpophalangeal joints. The treatment is to strengthen the spleen, resolve dampness, tonify qi and blood, and supplement with cooling blood and detoxifying products. Case 2 has a long history of disease, with deficiency of Qi and Blood in the spleen and stomach, and loss of muscle nourishment, resulting in weakness of the limbs and muscle atrophy. The liver is the master of tendons and the kidney is the master of bones. If the liver and kidney are deficient, the tendons and bones are not nourished, and if they move more, they are sore and shaky. Therefore, the treatment starts with tonifying the liver, spleen and kidney. After the two patients were treated, the symptoms improved and the relevant laboratory indexes returned to normal. At the same time, the hormones were gradually reduced and stopped, which not only improved the therapeutic effect but also avoided or reduced the toxic side effects of hormones. Thus, it seems that the treatment of DM and PM with Chinese herbal medicine has good application prospects and should be further explored and studied.